Reactivity series of metals

Give reason:

Sodium is more reactive than aluminium.

Which of the following pairs will give displacement reactions?

Chemical reaction does not take place when copper is added to iron sulphate solution because iron is _____ (less / more) reactive than copper.

Which of the following reaction is a single displacement reaction?.

On the basis of the sequence of the given reactions identify the most and least reactive elements:

$\mathrm{X} + \mathrm{YA} \to \mathrm{XA} + \mathrm{Y}$ ...(i)

$\mathrm{X} + \mathrm{YB} \to \mathrm{XB} + \mathrm{Y}$ ...(ii)

$\mathrm{Z} + \mathrm{XA} \to \mathrm{ZA} + \mathrm{X}$ ...(iii)

Name one metal which displaces silver from silver nitrate solution. (Copper / Lead)

Copper is more reactive than zinc, aluminium and iron. Therefore it displaces zinc, aluminium and iron metals from their salt solutions. 

Match the following:

In a solution of lead acetate, a strip of metal $\mathrm{M}$ was dipped. After sometimes, lead from the solution was deposited on the metal strip. Which metal is more reactive, $\mathrm{M}$ or lead?

State and explain the reactions, if any, of the following metals with a solution of copper sulphate:

(a) Gold

(b) Copper

(c) Zinc

(d) Mercury

The metal that does not displace hydrogen from an acid is _____ .